A 1910 Dugan "ELECTRIC" Black Amethyst "Argonaut - Nautilus" Carnival Glass Creamer or Candy Dish - Bowl ! This "Water , Seaweed and Shell" motif Carnival Glass Bowl is the best example of all I've searched on the net ! A true "electric" color on both sides with an "opaque" deep "black" amethyst glass that only reveals its "inner color" when held up to a very very bright lightbulb !! Superb iridescence inside and outside the bowl ! Mint condition with very minute, "in manufacture" mold line edge roughness to the bottom edge , Not damaged in any way ! Measures 6 1/2 inches long by 4 1/4 inches high . A "best" example !! Please see all 12 pictures !